JPS5842922Y2 - Joint structure for easy water pressure testing - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the structure of a joint to which an insertion tube is connected via a sealing gasket, and more specifically to a hydraulic joint structure that is easy to test.

When a pipe socket and a pipe insertion port are connected, a water pressure test is performed by applying water pressure from the inner surface of the joint in order to test the watertightness of the joint.

FIG. 1 is a cross-sectional view of a main part showing an example of a joint where such a water pressure test is conducted. A stopper link 4 is provided to regulate the insertion depth of the tube insertion port 2 on the back side of the tube socket 1 and to fill the triangular space.

The water pressure test of the joint was conducted as follows.

That is, after forming a sealing test gap A by tightly holding the hydraulic test device 5 made of the seal rubber 6 and the support plate 1 in the entire circumferential direction on the inner surfaces of the tube insertion tip end 2a and the tube socket straight pipe section 1a, Test water pressure is injected into the gap A, and based on the water pressure acting on the back surface 3a of the packing 3, it is determined whether the pressure water leaks out of the pipe from the joint.

However, the stopper ring 4 is provided for the purpose described above, and its sealing performance is completely ignored.

Therefore, in the water pressure test of such a joint structure, the sealing test gap A must be formed between the packing 3 and the seal rubber 6, so the stopper ring 4 does not have a sealing effect.
must be placed within the sealing test gap A, and the width of the seal rubber 60 becomes wider.

Therefore, the hydraulic test device 5 must be relatively large and wide, which increases its weight, makes it difficult to transport, and is extremely difficult to handle.

Moreover, since a large amount of pressurized water is required, it is time consuming and has low workability.

The present invention was developed with attention to the above circumstances, and by providing a joint structure that facilitates water pressure tests without impairing the function of the joint, it is possible to create a relatively small hydraulic test device. This allows for water pressure testing.

That is, the configuration of the present invention is a joint structure in which a pipe socket is inserted into a pipe socket in which a stopper ring is inserted at the back end of the large diameter part, and a pipe socket is connected to the pipe socket through a sealing packing. The gist is that a sealing ring is interposed at the contact portion between the outer peripheral edge and the inner peripheral surface of the tube socket.

The configuration and effects of the present invention will be specifically explained below based on the drawings which are examples. However, the following examples are only representative examples for explaining the present invention, and various designs may be made based on the purpose of the above and below. Any modifications are included within the technical scope of the present invention.

FIG. 2 is a cross-sectional view of the main parts illustrating the joint structure according to the present invention. The pipe socket 1 and the pipe socket 2 are inserted by inserting the packing 3 into the pipe socket 1 in the same way as in FIG. 1. It is connected.

In other words, the joint structure according to the present invention that is easy to perform a water pressure test is one in which a sealing ring 13 is interposed on the outer periphery of a stopper ring 14 disposed on the back side of the socket, and the sealing ring 13 is inserted into the outer circumferential edge of the stopper ring 14 disposed on the back side of the socket. The test water that is press-fitted near the back surface 3a of the tube is configured to prevent the test water from flowing into the tube through the space between the outer circumferential surface of the stopper ring 14 and the inner surface 110 at the rear end of the large diameter portion.

Therefore, as the hydraulic test device 15 applicable to the present invention, a seal rubber 16 with a width small enough to straddle the tube insertion tip 2a and the inner surface of the stopper ring 14 can be applied, so that the test gap B is sealed. can be configured to have a smaller volume than conventional ones.

As described above, since a small hydraulic test device can be used with the joint of the present invention, the work of attaching and detaching the hydraulic test device 15 and the transportation work are facilitated, and the amount of test water to be press-fitted can be reduced.

Therefore, the time required for the hydraulic pressure test for each pipe connection can be shortened, and the piping construction time can be greatly reduced.

It should be noted that the stopper ring that can achieve the present invention is not only applicable to the pipe socket 1 as shown in the figure, but is also applicable to, for example, the third pipe socket 1.
It can also be applied to a pipe socket 1 as shown in the figure.

As described above, the joint structure of the present invention can be applied to any shape as long as the joint structure is inserted through the packing and the stopper ring is inserted into the inner end of the large diameter part.

In addition, in order to increase the stability of the stopper ring,
For example, adhesive 13a may be filled in the contact position between stopper ring 14 and tube socket straight pipe portion 1a.

By the way, the stopper ring 14 may be installed synchronously with the diameter expansion molding of the pipe socket 1, or the stopper ring 14 may be inserted after the pipe socket 1 is formed. The choice of timing is left to the person implementing the invention.

4 to 1 are cross-sectional views showing other embodiments applied to the present invention. In FIG. 4, the stopper ring 14 is formed of solid material, and the sealing ring 13 is attached via an adhesive 13b. Installed.

Figure 5 shows the sealing ring 13 and the stopper ring 14.
This is an example of a mounting method in which a fitting part 13 is formed in a sealing ring 13 so as to be integrated with a stopper ring 14.

In FIG. 6, the tip 2a of the tube insertion port can be protected, and the sealing ring 13 is formed so that it can also function as a cushioning material.

FIG. 7 shows an embodiment in which the sealing performance of the sealing ring 13 is improved, and the entire contact surface between the stopper ring 14 and the tube socket 1 is sealed.

In this way, the seal ring 13 and the stopper ring 1
4 regulates the insertion depth of the tube socket and fills the gap so that the pressure water injected into the sealing test gap B (Fig. 2) is connected to the inner surface on the back side of the tube socket and the outer periphery of the stopper ring 14. Any shape may be used as long as it is configured to prevent leakage into the pipe from between the pipes.

It is recommended that the sealing ring 13 be made of rubber or the like with high sealing properties.

Since the present invention is constructed as described above, (1) water pressure tests can be easily carried out.

■Does not impair its function as a joint.

■ Requires less amount of water for testing.

■ The water pressure test device can be made lightweight.

■ Water pressure test time can be shortened, and the overall construction period can also be shortened.

You can enjoy various effects such as.

[Brief explanation of drawings]

The figures are for explaining the present invention. Fig. 1 is a sectional view of the main part illustrating a known water pressure test of a joint part, and Fig. 2 shows a joint structure of the present invention, and a water pressure test was carried out on a joint part of the present invention. Fig. 3 is a sectional view of the main part showing another embodiment of the present invention, and Figs. 4 to 7 are sectional views illustrating the stopper ring applied to the present invention. be. 1...Tube socket, 2...Tube insertion, 3...Packskin
4... Ring for stopper, 5... Water pressure test device, 6
...Seal rubber, 7...Support plate, A, B...Sealing test gap.

Claims (1)

[Scope of utility model registration request] A stopper ring is inserted into the pipe socket at the back end of the large diameter part.
A joint structure in which a pipe socket is inserted and connected through a sealing gasket, characterized in that a sealing ring is interposed in the contact area between the outer peripheral edge of the stopper ring and the inner peripheral surface of the pipe socket. Joint structure for easy water pressure testing.